Wrench



Patented July Z3, 1929.

UNTED STATES i einen PATE T OFFICE.

JOSEPH R. MAI-IAN, OF TOLEDO, OHIO, ASSIG-NOR TO THE NATIONAL SUPPLY COM- PANY, 0F TOLEDO, OHIO, .A CORPORATION OF OHIO.

WRENCH.

Application filed October 13, 1928. Serial No.v 312,274.

My invention relates to wrenches designed for setting up and breaking, or disconnecting, threaded sucker rod joints, but capable of use for other purposes.

It is the practice when using a sucker rod wrench to snap up and break the sucker rod joints by a rapid movement of the wrench. Sometimes the outer end ot the wrench handle is struck a blow to ensure a tightjoint. It is the object of this invention to provide an improved wrench wherein t-he handle has a lost-motion connection with the wrench head so that the handle may acquire considerable energy in taking up the lost nior tion before it makes operative Contact with one or more stops on the head. ly this invention the handle imparts operative blows to the head either 'for tightening or loosening a threaded joint.

Referring to the accompanying drawing, Fig. 1 is a perspective view of my invention; Fig. Q, a sect-ion on the line 2 2 on Fig. 1; and Fig. 3, a section on the line 3 3 on Fig. 1.

On the drawing, I show the wrench head 10 in the form of a cylinder having a circumferential groove 11 and an open slot or jaw 12 extending from the periphery about tothe` center o'f the head.

13 is the wrench handle having the arcuate end 14 with a tongue 15 seated in and .fitting the groove 11 and with portions adjacent to the base of the tongue provided with shoulders 16 riding on the periphery of the head at the sides o't' the groove 11. The arcuate end 14- oi the handle does not form a complete circle but has a space between its end and the handle to register with the open end of the jaw 12.

The head 10 has the radial lng 17 which has travel between the two lugs 18 and 19 on the head 10.

Then the handle is lowered rapidly from the position shown, the lug 18 will deliver a hard blow to t-he lug 17 which will tend to turn the head 10 clockwise, and when the handle is moved rapidly in the other direction to that shown, a shock will be given through the lugs 17 and 19 tending to turn the head anticlockwise.

In order to permit the assembly of the head 10 and the endll of the handle, the head is made of two parts 20 and 21 secured to gether by suitable fastening devices, such as the rivets 22.

.I claim 1. In a wrench, a head member having an open-ended slot extending from its periphery inwardly, a handle member having a hook-like inner end embracing the head member, one member having an arcuate groove receiving an arcuate portion on the other member, and the opening into said hook-like end being adapted to register' with the open end of the slot, two lugs on one member, and a lug on the other member and intermediate said two lugs, the distance between the said lugs being greater than the width of the intermediate lug.

2. In a wrench, a rotary head having a j )eripheral groove and a slot open at the periphery of the head, a lug carried by the head and projecting up above a lateral face of the head, a handle having a hooked end with a portion having travel in the groove, and two lugs carried by the handle, the rst lug being between the said two lugs and the distance between the said two lugs being greater than the width o1 the first lug.

3. In a wrench, a disk-like member with an open radial slot and a peripheral arcuate groove, and a handle member having an arcuate open inner end fitting the groove, one member having two lugs and the other one lug between the two lugs, the distance between the two lugs being greater than th width of the one lug.

In testimony whereof I hereunto ailix my signature. JOSEPH R. MAHAN. 

